Déplacement des centres instantanés de rotation de l’épaule au cours de l’abduction

Blaimont, P; Taheri, Arash; Vanderhofstadt, A.

doi:10.1016/s0035-1040(05)84356-9

Cited by 6 publications

(3 citation statements)

References 1 publication

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“… 5 In this regard, failure of the infraspinatus and the depressor function of the humeral head would allow ascension by means of an injured supraspinatus that would not occupy the subacromial space. 6 , 7 , 8 , 9…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the acromiohumeral distance by means of magnetic resonance imaging umerus

França

Godinho

Ribeiro

et al. 2016

Revista Brasileira de Ortopedia (English Edition)

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ObjectiveTo demonstrate the relationship between the size, degree of retraction and topography of rotator cuff injuries and the degree of rise of the humeral head, and to evaluate the influence of gravity, using magnetic resonance imaging (MRI).MethodsWe evaluated 181 shoulder MRIs from 160 patients aged over 45 years, between November 2013 and July 2014. The patients were divided into two groups: one control (no lesion or partial damage to the rotator cuff); and the other with complete tears of the rotator cuff. We measured the acromiohumeral distance in the sagittal plane, and established the shortest distance between the apex of the head and the acromion.ResultsIn this study, 96 examinations on female patients (53.04%) and 58 on male patients (46.96%) were evaluated. The mean age was 63.27 years: in the control group, 61.46; and in the group with injuries, 65.19. From analysis on the measurements of the subacromial space, we observed significantly higher values in the control group (7.71 mm) than in the group with injuries (6.99). In comparing the control group with some specific subgroup, i.e. posterosuperior (6.77), anteroposterior-superior (4.16) and retraction Patte III (5.01), we confirmed the importance of topography and degree of retraction in relation to the rise of the humeral head.ConclusionThe rise of the humeral head was directly related to the size, degree of retraction and topography of the rotator cuff injuries, with greater degrees of rise in cases of superior and posterior lesions and anteroposterior-superior (massive) lesions. The assessment using MRI was not influenced by the force of gravity.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the acromiohumeral distance by means of magnetic resonance imaging umerus

França

Godinho

Ribeiro

et al. 2016

Revista Brasileira de Ortopedia (English Edition)

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“…ST participation is more important for RSA biomechanics than for a normal shoulder [9][10][11]. While the glenohumeral (GH) joint is 2.5 times more active than the ST joint during abduction or forward elevation in normal conditions, the participation ratio (GH/ST) decreases from 1.5 to 1 after RSA, especially over 30 • of range [12].…”

Section: Introductionmentioning

confidence: 99%

The Real Post-Operative Range of Motion Differs from the Virtual Pre-Operative Planned Range of Motion in Reverse Shoulder Arthroplasty

Berhouet

Samargandi

Favard

et al. 2023

JPM

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Introduction: The purpose of this study was to analyze the real range of motion (RoM) measured in patients operated on for reverse shoulder arthroplasty (RSA) and compare it to the virtual RoM provided by the preoperative planning software. Hypothesis: There was a difference between virtual and real RoM, which can be explained by different factors, specifically the scapula-thoracic (ST) joint. Methods: Twenty patients with RSA were assessed at a minimum follow-up of 18 months. Passive RoM in forward elevation abduction, without and with manually locking the ST joint, and in external rotation with arm at side were recorded. The humerus, scapula, and implants were manually segmented on post-operative CTs. Post-operative bony structures were registered to preoperative bony elements. From this registration, a post-operative plan corresponding to the real post-operative implant positioning was generated and the corresponding virtual RoM analysis was recorded. On the post-operative anteroposterior X-rays and 2D-CT coronal planning view, the glenoid horizontal line angle (GH), the metaphyseal horizontal line angle (MH), and the gleno-metaphyseal angle (GMA) were measured to assess the extrinsic glenoid inclination, as well as the relative position of the humeral and glenoid components. Results: There were some significant differences between virtual and post-operative passive abduction and forward elevation, with (55° and 50°, p < 0.0001) or without ST joint participation (15° and 27°, p < 0.002). For external rotation with arm at side, there was no significant difference between planning (24° ± 26°) and post-operative clinical observation (19° ± 12°) (p = 0.38). For the angle measurements, the GMA was significantly higher (42.8° ± 15.2° vs. 29.1°± 18.2°, p < 0.0001), and the GH angle, significantly lower on the virtual planning (85.2° ± 8.8° vs. 99.5° ± 12.5°, p < 0.0001), while the MH was not different (p = 0.33). Conclusions: The virtual RoM given by the planning software used in this study differs from the real post-operative passive RoM, except for external rotation. This can be explained by the lack of ST joint and soft tissues simulation. However, in focusing on the virtual GH participation, the simulation looks informative. Some modifications between the glenoid and humerus starting positions before running the motion analysis could be provided for making it more realistic and predictive of the RSA functional results. Level of evidence: III.

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“…During active movements of the shoulder, the rotator cuff and shoulder ligaments stabilize the glenohumeral joint by limiting humeral head translations in supero-inferior direction and in antero-posterior direction (Sahara et al 2007 ). In addition, the morphology of the shoulder complex allows by a wide spectrum of movements, where ligaments and muscles guarantee its stability (Halder et al 2000 ; Blaimont et al 2006 ). For this reason, neuromuscular control plays an important role, minimizing the displacement of the center of rotation of the shoulder during upper limbs movements (Doorenbosch et al 2003 ; Blaimont et al 2006 ).…”

Section: Introductionmentioning

confidence: 99%

Helical axis analysis to quantify humeral kinematics during shoulder rotation

Cescon

Barbero

Conti³

et al. 2019

International Biomechanics

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Information pertaining to the helical axis during humeral kinematics during shoulder rotation may be of benefit to better understand conditions such as shoulder instability. The aim of this study is to quantify the behavior of humeral rotations using helical axis (HA) parameters in three different conditions. A total of 19 people without shoulder symptoms participated in the experiment. Shoulder kinematics was measured with an optoelectric motion capture system. The subjects performed three different full range rotations of the shoulder. The shoulder movements were analyzed with the HA technique. Four parameters were extracted from the HA of the shoulder during three different full-range rotations: range of movement (RoM), mean angle (MA), axis dispersion (MDD), and distance of their center from the shoulder (D). No significant differences were observed in the RoM for each condition between left and right side. The MA of the axis was significantly lower on the right side compared to the left in each of the three conditions. The MDD was also lower for the right side compared to the left side in each of the three conditions.The four parameters proposed for the analysis of shoulder kinematics showed to be promising indicators of shoulder instability.

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Déplacement des centres instantanés de rotation de l’épaule au cours de l’abduction

Cited by 6 publications

References 1 publication

Evaluation of the acromiohumeral distance by means of magnetic resonance imaging umerus

Evaluation of the acromiohumeral distance by means of magnetic resonance imaging umerus

The Real Post-Operative Range of Motion Differs from the Virtual Pre-Operative Planned Range of Motion in Reverse Shoulder Arthroplasty

Helical axis analysis to quantify humeral kinematics during shoulder rotation

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